Motorola MTR3000 User Manual

4-14 Theory of Operation
Refer to Table 4-6 for description on audio signals.
4.2.7 Ethernet Interface
Since OMAP1710 does not support a direct Ethernet interface, a bridge device (U3005M7) is
needed to support Ethernet on the SCM. The bridge device is a high performance hi-speed USB2.0
to 10/100 Ethernet controller. The device contains an integrated 10/100 Ethernet PHY, USB PHY,
Hi-Speed USB 2.0 device controller, 10/100 Ethernet MAC, TAP controller, EEPROM controller and
a FIFO controller with a total of 30 KBytes of internal packet buffering. The following is a list for
functionality that the Ethernet Interface can provide:
• Fully Compliant with IEEE 802.3 and 802.3u Compatible Ethernet Controller
• 10Base-T and 100Base-Tx support
• Integrated Media Access Control (MAC) and PHYsical (PHY)
Table 4-6 SCM Audio Level
Audio Signal Description
Tx Audio The Tx Audio input provides no hardware pre-emphasis. The nominal level of
80 mVrms (158 mVpp) produces 60% Relative Standard Deviation (RSD).
Tx Audio-Pre The Tx Audio-Pre input provides a hardware pre-emphasis network. The nominal
level of 80 mVrms (158 mVpp) produces 60% RSD.
Tx Data Transmit data, PL or DPL signaling. The nominal level of 80 mVrms (158 mVpp)
produces 12% RSD.
Mic Local microphone input. Use microphone type GMN6147 (older model) or
GMMN4063. Modulation sensitivity for 60% system deviation is typically 56
mVrms (158 mVpp).
Note : The Mic port is only supported in analog mode regardless of the Mic used.
For older model of microphone (GMN6147), the 3 control buttons for speaker
volume control, Rx monitor and Intercom control functions are not supported.
Aux Rx Audio An RF input signal with 60% RSD provides an Rx Audio output of 330 mVrms into
50 kΩ. Also a microphone input of 56 mVrms provides an Aux Rx Audio output of
330 mVrms into 50 kΩ. The Rx Audio output has DC bias of 2.5 VDC.
Rx Audio An RF input signal with 60% RSD provides an Rx Audio output of 330 mVrms into
50 kΩ. The Rx Audio output has a DC bias of 2.5 VDC.
Speaker Output to Powered Voice speaker. Adjustable between 0 to 500 mVrms (1.4 Vpp)
across 1 kΩ @ 60% system deviation. Audio signal appears between Pins 3 and 4
on the connector. Must use speaker type HSN1000 (older model) or HSN1006 via
adapter cable Part.No. 0185180U01.
Note : The Speaker port is only supported in analog mode regardless of the
speaker used.
Note When using third party controllers, refer to MTR3000 Third Party Controllers (Appendix G)
section in the MOTOTRBO
TM
MTR3000 Base Station/Repeater Basic Service Manual
(68007024096) for CPS configuration in conjunction with the selection of the correct Tx
Audio paths to prevent a double pre-emphasis.

Motorola MTR3000 Specifications

General

Brand	Motorola
Model	MTR3000
Category	Accessories
Language	English